Chapter 2. System Function Call (Firmware Function Call); Check Smart Card - Unitech MR350 MKII Software Manual

Chapter 2. System function call (Firmware function call):

Below 3 system function calls are implemented on the Firmware of MR350MKII. Those function
call only support short format and protocol are available for T=0 and T=1. All of the system
function calls are implemented on system interrupt vector 06H (INT 06H)

3.1 Check Smart Card

In Smart Card reader, there is a detector to check whether Smart Card is inserted. After that,
reader will check whether card is shorted. This action can avoid accepting bad card to protect
reader itself.
Entry Parameter
INT 06H
AH = 0
Return value :
AL =
If AL =
:
0 NO CARD PRESENT
1 Smart Card SHORT
2 Smart Card EXIST
2 AH = 0 Smart Card isn' t power-on
1 Smart Card is already power-on
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